Improvement in setting flues and tubes in steam-boilers



A. CLANCONA.

SETTING FLUES AN'D'TUBES IN STEAM-BOILERS.

N.0-134=,314. Patented Nov. 14, 1876.

0 O O O O 0o o o 0 o Q 0o O o O 0 O 00 0 0 G o O 0 O O O O 0 O O 0UNITED STATES PATENT QFFIGE.

ASTLEY G. ANCONA, OF EVANSVILLE, INDIANA.

IMPROVEMENT IN SE TTING FLUES AND TUBES IN STEAM-BOILERS- Specificationforming part of Letters Patent No. 184,314, dated November 14, 1876;application filed April 7 To all whom it may concern:

- Be it known that I, ASTLEY G. ANCONA, of Evansville, Indiana, haveinvented certain Improvementsin Securing the Tubes of Steam- Boilers, ofwhich the following is a specification:

The main object of my invention is to so construct the tubes of asteam-boiler that they may be removed and reset without piecing, afurther object being a simple and secure method of attaching the tubesto the front tubesheet.

In the accompanying drawing, Figure 1 is a longitudinal section of alocomotive-boiler with my improvements; Fig. 2, an enlarged View of thefront and rear tube-sheets and corresponding ends of the tubes, and Fig.3 a sectional view of the retaining ring or ferrule.

A is the rear tube-sheet of a locomotiveboiler, B the front tube-sheetof the same, and

0 one of the tubes, the latter being secured at one end to the sheet A,at the furnace end of the boiler, but projecting at the otherorsmoke-box end beyond the sheet B, to which,

at the point where it passes through the said sheet, it is'secured bymeans of a ring or ferrule, E, adapted to the opening in the sheet,which opening is enlarged, as shown at F, Fig. 2.

In fitting a tube to the boiler its rear end is inserted through one ofthe enlarged openings, F, in the front tube-sheet B, and the tube isthen passed inward until its rear end projects through the correspondingopening in the rear plate A. To this plate it is attached by swaging orotherwise, and after it is secured the ring or ferrule E is slipped overthe opposite end of the tube, and driven tightly into the opening F. Thetube is finally expanded both inside and outside the sheet B by means ofa suitable tool, so that the said sheet B is stayed against internalpressure, and the ring E prevented from moving independently of thetube.

A rib, s, is, by preference, formed around the front edge of the ring E,to prevent the latter from being driven through the sheet so far that ashoulder would be formed on its inner edge in expanding the tube, andwhich would prevent the removal of said ring when desired. 7

When it becomes necessary to remove a tube for cleansing, repairs, orotherwise, the swaged portion at the rear end of the tube is cut off,and the tube then driven out through the front sheet, carrying with itthe ring or ferrule E. This is then cutoff, and, after the tube has beenrepaired or cleansed, it is again inserted, as before, its rear endswaged to the rear plate, and another ring, E, slipped over the stillprojecting front end of the tube driven into the front plate, and thetube expanded on the outside of the sheet, the expanded portion, whichwas before outside, being now inside the sheet.

It will be evident that, by making the tubes longer than the distancebetween the outside faces of the opposite sheets A and B,

and allowing the surplus portion to project beyond the front sheet, theremoval and resetting of the tubes can be accomplished without anypiecing of the tubes, such as is demanded with the present construction.

I claim as my invention- 1. A boiler in which the tubes extend throughand beyond the front tube-sheet, as and for the purpose herein setforth.

2. The combination of the front tubesheet B,and its enlarged openings F,with the rings or ferrules E, and the tubes 0, expanded on both sides ofsaid rings, as set forth.

In testimony whereof I have signed my.

name to this specification in the presence of two subscribing witnesses.

ASTLEY COOPER ANOONA. Witnesses:

THOS. L. ROBERTS,

B. F. SMITH.

